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KEPID AMSTECH CO. LTD. EMU11A Manual Do Utilizador

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1. General Information 
 
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1.5.3  EMR (Energy Meter Router) 
EMR is the router that relays the 
data between EMU and EMG. It is 
automatically detected by an EMG. 
An EMG can connect EMRs up to 
255 logically.   
EMR has the same shape as EMG 
except for USB connection port to a 
PC. EMR has no connection port. 
The adapter that is used to supply 
power must have been evaluated by 
UL. The DC power to EMR can use 
the DC adapter for 5 to 9 V. 
 
1.5.4 Handling multiple EMUs using Zigbee 
If multiple EMUs need to be monitored and controlled, the collected data can be 
transferred to a wireless EMR via the wireless Energy Meter routers (EMR) as shown 
in Figure 1.1. Otherwise, an EMR is directly connected to an EMU. 
Each individual EMU has its own unique ID that can be set using the DIP switches 
inside EMU. Otherwise, users can use the factory default settings. 
The network communication has been implemented following the ZigBee specification. 
The communication features are: 
 
RF wireless frequency: 2.4 GHz 
 
IEEE 802.15.4 compliant radio 
 
Channel access via CSMA-CA 
 
Extensible to multiple nodes (maximum 64: EM357 code spec) 
 
Q-QPSK modulation 
 
Data transmission speed: up to 250 kbps 
 
Data transmission distance: up to 100 m 
 
Channel bandwidth: 5 MHz